Its better to turn your bathroom into designs likes ocean.
You can design by fixing some light ocean colored glass on wall and put a few ball behind the glass. On other wall, stick some amazing wallpapers by including some digital lights. And on the top side fix a 3D wallpaper and fix few balls in rest of the places like upper corner and the other vacant area if only, you feels that light isn't sufficient.
I hope It will give you very cool feeling at the time of bath.